Great stuff fireblock needed? – GreenBuildingAdvisor

Replies

1. Expert Member

   BILL WICHERS | Apr 27, 2025 06:52pm | #1

   There should be wood blocking back there. If it’s a complete gap all the way through, then you don’t really have a fire rated assembly and I wouldn’t trust the foam alone to really do the job.

   Aside from that, yes, you should be using the orange fire block foam here, because the wall assembly is part of a fire barrier between the garage and dwelling areas.

   Bill

2. 

   monkeyman9 | Apr 27, 2025 09:42pm | #2

   Just a caution. Great stuff fireblock is def flammable. I’d use something else for a garage where its exposed and you may use a grinder, torch etc. I made a video once of normal great stuff, fireblock great stuff and 2 component closed cell foam I used. The 2 component didn’t wanna light wirh my blow torch. The 2 great stuffs lit and kept on burning. Look at the MSDS sheets. I’m pretty sure both great stuffs are the same other than colorant.

   Plenty of videos on youtube or try yourself. Take a look.
   
   https://youtu.be/djB4dmfHhQk?si=Rh2uxYGhBX9hoS3l
   
   https://youtu.be/IYor83AQEG0?si=q0O7rRyOcmTQ-BT7

1. 

   kickstarter | Apr 27, 2025 11:00pm | #3

   Thanks. Anything you recommend that comes in a can and is orange? I need it to pass inspection

1. 

   monkeyman9 | Apr 27, 2025 11:45pm | #4

   DAP Touch ‘n Foam Fire Break is the only name brand orange one I’ve seen that doesn’t keep burning. Was a few years ago I dug into this…may be another now as there were a couple off brand ones back then too…but not orange.